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Subject: Re: Rebel's anti-GM option

Author: Ernst A. Heinz

Date: 00:38:59 06/24/98

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On June 23, 1998 at 16:19:32, Bruce Moreland wrote:
>
>I get a fail high a few minutes into this, but the re-search fails low.
>
>I like aggressive play, and I like speculative play that works, but I think > >that programs are seeing something here that doesn't exist.

Bruce,

After running for 45 min. "DarkThought" shows the same behaviour as "Ferret"
and switches to 1. Nxe6 in iteration #14. It kept this move over night until
completion of iteration #16 with a slightly positive score of +0.25.

PV = 1. Nxe6 fxe6 2. Qxe6 a6 3. Bxa6 Bxa6 4. Qxa6 Ra8 5. Qc6 Ra5 ...

But again this might still be too optimistic (3 pawns for the knight).

> [...]
>
>I would be happy to be shown a line that has any promise for white.  If someone
>thinks that this really does win, or at least offers good counterplay, please
>post a line.
>
>My own analysis shows a nasty check or two, then black is simply up material.

Starting after 1. Rxe6 fxe6 "DarkThought" suggests 2. Bh6 and feels down with
a score of -0.5 after overnight analysis.

PV = 2. Bh6 a6 3. Nxe6 axb5 4. Ng7+ Kf8 5. Ne6+ Kf7 6. Nxd8+ Rhxd8 ...

>As I said before, I like speculative play, and this might be the best way to
>play very strong players, I do not know.
>
>But I don't think this move gets an "!" or "!!" in an absolute sense, I think
>it is "?!", and I don't know if this is properly understood by any of these
>programs, including mine.

You are absolutely right -- most programs including "DarkThought" seem to
over-estimate the attacking chances of White in this position.

But anyway, it is such an interesting sacrifice with many chances for Black to
go wrong that I do not mind "DarkThought" to play it. Other games are lost in
much worse fashion than this position (if lost at all) after the sacrifice ...

=Ernst=



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